Buttermilk-Brined Roast Chicken with Cajun Spices

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A tender, juicy roast chicken soaked in a buttermilk brine and seasoned with smoky Cajun spices for a flavorful Southern-inspired main dish. This southern-inspired chicken ready in about 90 minutes pairs pounds whole chicken, buttermilk, kosher salt for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 450 calories and feeds 6, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 75 min Serves 6 Southern cuisine 450 cal/serving
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Ingredients

Instructions

  1. Step 1: In a large bowl, whisk together 4 cups buttermilk and 3 tbsp kosher salt until salt dissolves. Submerge the 4-pound whole chicken completely in the buttermilk brine, cover, and refrigerate for 8 hours or overnight to tenderize.
  2. Step 2: Preheat oven to 425°F. In a small bowl, mix 2 tbsp paprika, 1 tbsp garlic powder, 1 tbsp onion powder, 1 tsp cayenne pepper, and 1 tsp black pepper to create the Cajun spice rub.
  3. Step 3: Remove the chicken from the brine and pat dry with paper towels. Rub the chicken all over with 2 tbsp olive oil, then generously coat with the Cajun spice mix, including inside the cavity.
  4. Step 4: Stuff the cavity with 4 fresh thyme sprigs and 1 halved lemon. Place the chicken breast-side up on a roasting rack in a roasting pan.
  5. Step 5: Roast the chicken for 1 hour and 15 minutes, or until an instant-read thermometer inserted into the thickest part of the thigh reads 165°F and the skin is deep golden brown and crispy.
  6. Step 6: Let the chicken rest for 15 minutes before carving to allow juices to redistribute, then serve warm.

Equipment for this recipe

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Frequently asked questions

How long does Buttermilk-Brined Roast Chicken with Cajun Spices take to make?

Total time is about 90 minutes (15 min prep + 75 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Buttermilk-Brined Roast Chicken with Cajun Spices?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep pounds whole chicken from drying out.

Can I substitute ingredients in Buttermilk-Brined Roast Chicken with Cajun Spices?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Buttermilk-Brined Roast Chicken with Cajun Spices for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Buttermilk-Brined Roast Chicken with Cajun Spices?

Southern chicken like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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